Portable operation center



FIG. 1 is a top perspective view of a portable operation center showing my new design;

FIG. 2 is a front and right side perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a another front and right side perspective view thereof; and,

FIG. 5 is an enlarged rear and right side perspective view thereof. 

The ornamental design for a portable operation center, as shown and described. 